OFFSET
1,2
COMMENTS
a(69) = 492226 is probably the last term. Any further terms must be greater than 1.5 * 10^18. [Charles R Greathouse IV, Jun 27 2011]
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..69
MAPLE
isA192320 := proc(n) floor( n-4*root[4](n)) ; nextprime(%) > n ; end proc:
for n from 1 do if isA192320(n) then printf("%d, \n", n) ; end if; end do: # R. J. Mathar, Jun 29 2011
PROG
(PARI) isA192320(n)=nextprime(floor(n+1-4*n^.25))>n \\ Charles R Greathouse IV, Jun 27 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Jun 27 2011
EXTENSIONS
a(15) inserted, a(25) and a(34)-a(40) corrected by Charles R Greathouse IV, Jun 27 2011
STATUS
approved